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                [Pa2011]Journeys                 </h1>
                <p>时间限制：20s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：512MB</p>			</div>
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                                <h3>题目描述</h3><p><div></div>
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<div><span style="font-size: medium">Seter建造了一个很大的星球，他准备建造N个国家和无数双向道路。N个国家很快建造好了，用1..N编号，但是他发现道路实在太多了，他要一条条建简直是不可能的！于是他以如下方式建造道路：(a,b),(c,d)表示，对于任意两个国家x,y，如果a&lt;=x&lt;=b,c&lt;=y&lt;=d，那么在xy之间建造一条道路。Seter保证一条道路不会修建两次，也保证不会有一个国家与自己之间有道路。</span></div>
<div><span style="font-size: medium">Seter好不容易建好了所有道路，他现在在位于P号的首都。Seter想知道P号国家到任意一个国家最少需要经过几条道路。当然，Seter保证P号国家能到任意一个国家。</span></div>
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<pre style="font-size: 13px; color: rgb(68,68,68); line-height: 18px"></pre>
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<div style="clear: both; table-layout: fixed; margin: 10px 30px; overflow: auto; word-break: break-all; white-space: normal; text-align: left"><span style="color: #ff0000"><span style="font-size: medium">注意：可能有重边 </span></span></div></p><hr/><h3>输入格式</h3><p><p></p>
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<div><span style="font-size: medium">第一行三个数N,M,P。N&lt;=500000,M&lt;=100000。</span></div>
<div><span style="font-size: medium">后M行，每行4个数A，B，C，D。<span style="line-height: 1.5">1&lt;=A&lt;=B&lt;=N,</span><span style="line-height: 1.5">1&lt;=C&lt;=D&lt;=N。</span></span></div>
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</span></div>
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<pre style="font-size: 13px; color: rgb(68,68,68); line-height: 18px"></pre>
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</div></p><hr/><h3>输出格式</h3><p><p></p>
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<div><span style="font-size: medium">N行，第i行表示P号国家到第i个国家最少需要经过几条路。显然第P行应该是0。</span></div>
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</span></div>
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<h2 style="color: rgb(68,68,68); line-height: 18px; font-family: Tahoma, Arial"></h2>
<pre style="font-size: 13px; color: rgb(68,68,68); line-height: 18px"></pre>
</div>
</div></p><hr/><h3>样例输入</h3><pre>5 3 4
1 2 4 5
5 5 4 4
1 1 3 3


</pre><hr/><h3>样例输出</h3><pre>1
1
2
0
1</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>seter翻译</p>
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